<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="model.css">
    <style>
        *{
            margin: 0;
            padding: 0;
        }
       html,body{
        margin: 0 auto;
        padding-left: 20px;
        padding-right: 20px;
       }
       header{
        background-color: aquamarine;
        width: 100%;
        height: 50px;
       }
       footer{
        background-color: blueviolet;
        height: 50px;
       }
       section{
        padding: 10px;
        margin: 10px 0 10px 0;
        height: 800px;
        display: flex;
        flex-direction: row;
        justify-content: flex-start;
        flex-wrap: wrap;
        background-color: bisque;
       }
       section>div{
        margin-left: 10px;
        margin-top: 10px;
       }
       .div_one{
        height: 500px;
        width: 20%;
        background-color: yellow;
       }
       .div_two{
        height: 500px;
        width: 50%;
        margin-left: 10px;background-color: rgb(119, 182, 237);
       }
       #example{
        width: max-content;
        border-top: 20px solid red;
        border-right: 15px dotted green;
        border-bottom:  none;
        border-left: 10px double blue;
        margin-top: 5px;
        margin-right: 10px;
        margin-bottom: 15px;
        margin-left: 20px;
        padding-bottom: 5px;
        padding-right: 10px;
        padding-bottom: 15px;
        padding-left: 20px;
       }
       .div_three{
        height: 500px;
        width: 20%;
        flex: 2;
        background-color: black;
       }
       .div_four{
        height: 300px;
        width: 600px;
        background-color: blue;
        flex-grow: 2;
       }
       .div_five{
        height: 300px;
        width: 300px;
        background-color: rgb(126, 198, 43);
        flex-grow: 1;
       }
       .div_six{
        height: 300px;
        width: 300px;
        background-color: rgb(247, 97, 239);
        flex-grow: 1;
       }
    </style>
</head>

<body>
    <header>
        头部区域
    </header>
    <section>
        <div class="div_one">

        </div>
        <div class="div_two">
            <div id="example">
                <img src="./20200221213550951.jpg"  alt="盒子模型" height="400px">
            </div>
        </div>
        <div class="div_three">

        </div>
        <div class="div_four"></div>
        <div class="div_five"></div>
        <div class="div_six"></div>
    </section>
    <footer>
        底部区域
    </footer>
    <a href="./选择器.html">选择器</a>
</body>

</html>